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Finding the Third Proportional to 517,880 and 699,696

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Solution

The third proportional to 517,880 and 699,696 is: 945,343.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,880 : 699,696 = 699,696 : x
  2. Step 2: Convert to fraction form
    517,880/699,696 = 699,696/x
  3. Step 3: Cross multiply
    517,880x = 699,696 × 699,696
  4. Step 4: Simplify right side
    517,880x = 489,574,492,416
  5. Step 5: Solve for x
    x = 489,574,492,416/517,880
  6. Step 6: Final answer
    x = 945,343.50

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.